The heat shrink didn't come from HC, I always get it from that little electronics supply store near my home. I will get a company name and SKU number and try to find other distributors. Maybe HC has shrink similar to this. I am also thinking about something to keep the two battery wires separate. I gotta go to work, tomorrow is the big preparation for next week since we're off to an Hawaiian cruise. Be back on the 10th of August and will probably get to work on these.
Aloha!